wipe out all codes at the garage door opener itself. You don't know if any of the builders programmed these codes onto their own remotes to use at a later time. Then program each of the remotes, your car homeland buttons, external smart hubs to each of your garage door openers. Get a smart hub with a sensor for each garage door and program these so you can use your Apple Watch,iphones/iPads to open/close your garage doors and to check to see if your garage doors are closed remotely.
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